.start-ad {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  background-color: #000;
  position: absolute;
  z-index: 9999;
  .tip {
    position: absolute;
    right: 5px;
    top: 5px;
    background-color: #333;
    color: #fff;
    font-size: 14px;
    text-align: center;
    padding: 3px 7px;
    i {
      font-style: normal;
    }
  }
  a {
    width: 100%;
    height: 100%;
    display: inline-block;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    img {
      max-width: 100%;
      max-height: 100%;
    }
  }
}